CRITICAL 9.1 Microsoft
CVE-2026-55040
Microsoft SharePoint Server Security Feature Bypass Vulnerability
Microsoft Security Update 2026-Jul: Microsoft SharePoint Server Security Feature Bypass Vulnerability
Affected Products
- Microsoft SharePoint Enterprise Server 2016
- Microsoft SharePoint Server 2019
- Microsoft SharePoint Server Subscription Edition
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55040
- https://nvd.nist.gov/vuln/detail/CVE-2026-55040
This critical severity vulnerability with a CVSS score of 9.1 was published on 2026-07-14 via Microsoft. Affected: Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition.
Risk Timeline
CVE Disclosed2026-07-14 · 20 days ago
Remediation Resources
Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55040NVD / MITRE
nvd.nist.gov/vuln/detail/CVE-2026-55040Related Vulnerabilities
| CVE | Title | Severity | CVSS |
|---|---|---|---|
| CVE-2026-56191 | Microsoft Exchange Online Tampering Vulnerability | CRITICAL | 10.0 |
| CVE-2026-57106 | Data Quality Elevation of Privilege Vulnerability | CRITICAL | 10.0 |
| CVE-2026-33819 | Microsoft Bing Remote Code Execution Vulnerability | CRITICAL | 10.0 |
| CVE-2026-32186 | Microsoft Bing Elevation of Privilege Vulnerability | CRITICAL | 10.0 |
| CVE-2026-35431 | Microsoft Entra ID Entitlement Management Spoofing Vulnerability | CRITICAL | 10.0 |
| CVE-2026-23652 | Microsoft Power Pages Remote Code Execution Vulnerability | CRITICAL | 10.0 |
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